import java.util.Arrays;
import java.util.Scanner;

public class Test5 {
    public static void main(String[] args) {
        Scanner scanner =new Scanner(System.in);
        while(scanner.hasNextLine()){
            String str = scanner.nextLine();
            char[] chars = str.toCharArray();
            for (int i = 0; i < chars.length; i++) {
                char ch = chars[i];
                if (ch>='A'&& ch<='Z'){
                    ch += 32;
                    chars[i] = ch;
                }
            }
            String str_new = new String(chars);
            System.out.println(str_new);
        }
    }
}
